The state of Michigan doesn't require any kind of licensing for lawn maintenance work. My county doesn't give you a business license unless you have a place of business where business occurs. I am an LLC in Michigan, and have a number from that. But I don't have a business license, per say. While doing bids recently for a certain commercial account, the bid sheet asked for the Business License number. I'm not quite sure what to do exactly with that. I'm thinking I'm going to put my LLC # down and leave it at that. When I got my mortgage for my house the mortgage company wanted my business license as well. I tried to explain to them I don't have one, one is not given for my type of work. They made me come up with all kinds of other proof that I was in business instead.